VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98778: Linux kernel · binder: fix is_failure flag for superseded transaction cleanup

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in e9b364e46d594c2ec663c9c49f10c1ca541ecc0f : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e9b364e46d594c2ec663c9c49f10c1ca541ecc0f, 86cdcc87d4ba60aebf94ba3346b3c900c5cd79ff, 60a9f7323ae7318a7cce0d387c318da24f1e8726 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 9864bb4801331daa48514face9d0f4861e4d485b, < e9b364e46d594c2ec663c9c49f10c1ca541ecc0f	Fixed in e9b364e46d594c2ec663c9c49f10c1ca541ecc0f
LinuxLinux	Affected ≥ 9864bb4801331daa48514face9d0f4861e4d485b, < 86cdcc87d4ba60aebf94ba3346b3c900c5cd79ff	Fixed in 86cdcc87d4ba60aebf94ba3346b3c900c5cd79ff
LinuxLinux	Affected ≥ 9864bb4801331daa48514face9d0f4861e4d485b, < 60a9f7323ae7318a7cce0d387c318da24f1e8726	Fixed in 60a9f7323ae7318a7cce0d387c318da24f1e8726
LinuxLinux	Affected ≥ 9864bb4801331daa48514face9d0f4861e4d485b, < 22c135635fdd9816c0ef140d6de7b2e4fdf73e89	Fixed in 22c135635fdd9816c0ef140d6de7b2e4fdf73e89
LinuxLinux	Affected ≥ 9864bb4801331daa48514face9d0f4861e4d485b, < 1ab671b50714ad8e359cf37eb041d8044319ccdc	Fixed in 1ab671b50714ad8e359cf37eb041d8044319ccdc
LinuxLinux	Affected =6.0	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: binder: fix is_failure flag for superseded transaction cleanup When a TF_UPDATE_TXN transaction supersedes a pending async transaction, binder_release_entire_buffer() is called with is_failure=false. Since the superseded transaction was never delivered, binder_apply_fd_fixups() was never called and no fds were installed in the target process. With is_failure=false, the BINDER_TYPE_FDA cleanup handler interprets stale buffer contents as installed fd numbers and passes them to binder_deferred_fd_close(), closing unrelated file descriptors. Pass is_failure=true since the transaction was never delivered to the target, matching the semantics of all other undelivered-transaction cleanup paths.

References

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